Method of producing nitrogenous compounds from aluminum waste products.



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an snares Parana" canton.

PAUL RALPH HERSHMAN, OF CHICAGO, ILLINOIS, AS SIGNOR TO ARMOUR FERTILIZER WORKS, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

METHOD on PRODUCING'NITROGENOUS COMPOUNDS FROM ALUMINUM WASTE PRODUCTS. 1

No Drawing.

- To all whom it may concern:

' gen, and also to provide a method for ac complishing this result, which shall be economical in its execution. i

A preferred manner of carrying out thls process or method may be stated as follows: The skimmings obtained as a commercial by-product from the smelting of aluminum and its alloys, are powdered, and the alu= minum carbids contained therein are separated out by an air process, taking advantage oftheir different specific gravity. This separation may be readily accomplished by the employment of air currents and sieves in a manner used in analogous arts, and which does not need. specific de- The carbids are thenmixed with a small amount of a catalytic agent (say one-tenth to one per cent), capable of combining with nitrogen. As an example of such catalytic agent I may mention boron, titanium, or any of their compounds,

susceptible to reduction by carbon. It is also of advantage to add from two to five per cent. of carboniferous matter, which by decomposition forms minutely divided carbong'ia nd from one to two per cent. of calci'iz'ifi oxid, which serves to destroy the carbon monoxid formedin the process-and whiplh t e nitrogenous compounds.

TakingCH, as. atype of carboniferous I atter, this reaction may be expressed as llow'sz Specification of Letters Patent. Patented J ne 2?, 191% Application filed November 25, 1913. Serial No. 803,007. i

into oxid by the carbon monoxid produced at higher temperatures. Nitrogends passed through this mixture while ,the latter is heated to from approximately 1700 to 1800 centigrade, preferably in an electric resistance furnace. The mass formed contains from 15% to 20% nitrogen.

While I have herein set forth with some degree of particularity the ingredients employed,the percentages used,'an d the reactions occurring, I do not wish to be limited exactly to these details, because various minor changes may be made in the processes Without departure 'from the invention and without sacrificing any of its substantial advantages.

I claim: Y i

1. The method of producing nitrogenous compounds, which consists inheating in the presence of nitrogen at a temperatureof approximately 1700 to 1800 centigrade, a mixture of aluminum carbid, and from approximately one-tenth to one per cent. of a catalytic agent, substantially as described.

2. The method of producing nitrogenous compounds of aluminum, which consists in heating in the presence of nitrogen at a,

temperature from approximately 1700 to 1800 centigrade, a mixture of aluminum carbid, from approximately one-tenth to one per cent. of a catalytic agent, and from approximately two to fiveper cent. of carboniferous matter, substantially as described. w w

3. The method of producing nitrogenous compounds of aluminum, which consists in 'heatlng 1n the presence of nitrogen, a mixture of aluminum carbid, a. catalytic agent capable of "combining with nitrogen, and calcium oxid, substantially as described.

4.. The method of producing nitrogenous compounds of aluminum, which'consists in heat ng in the presence of nitrogen a' mix ture of aluminum carbid, fi'om approximately one-tenth to one per cent. of a catalytic agent capable of combining with nitro- V gen, and from approximately one to two percent. of calcium oxid, substantially as described.

5. The method of producing nitrogenous compounds of aluminum, which consists in heatm in the presence of nitrogen, a mixcapable of combining with nitrogen, carboniferous matter, and calcium oxid, sub-' stantially as described.

6. The method of producing nitrogenous compounds of aluminum, which consists in heating at approximately 1700 to l800 centigradc, in thepresence of nitrogen, a mixture of aluminum carbid, from approximately one-tenth to one per cent. of a catalytic agent capable of combining with nitrogen, from approximately two to five per cent. of carboniferous matter, and from substantially one to two per cent. of calcium oxid, substantially as described.

DR. PAUL RALPH HERSHMAN. Witnesses:

GEO. T. DALE, WALDEMAR SILL.

Copies of. thin patent ml; he obtained to: five cent: each, by marching the "commissioner or Yttfll Wuhtngtu, D. G." 

